# Voltage Divider vs CALC Smart Calculator ±

The clearest difference is price: CALC Smart Calculator ± at Free against Voltage Divider's $1.99. CALC Smart Calculator ± also leads on rating (4.8 vs 2.7) and review sentiment (87% vs 56%). Voltage Divider's advantage is in-app purchases (none vs 4) and iOS requirement (12.0 vs 17.0). On ads there is nothing between them.

CALC Smart Calculator ± is free to download; Voltage Divider costs $1.99 up front. CALC Smart Calculator ± sells 4 in-app purchases, starting at $0.99 per 3 months. Voltage Divider asks for nothing beyond the download.

CALC Smart Calculator ± holds the better App Store score, 4.8 against 2.7. That said, the two scores are not equally well evidenced: CALC Smart Calculator ± has 2.4K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 56% of Voltage Divider's written reviews are positive against 87% of CALC Smart Calculator ±'s.

Voltage Divider ships an update every 48 months, CALC Smart Calculator ± fortnightly. Both last shipped on October 23, 2026.

## The numbers

| Metric | Voltage Divider | CALC Smart Calculator ± |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/voltage-divider/id372094728/reviews) | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/calc-smart-calculator/id576675190/reviews)** |
| Number of ratings | 3 | **2.4K** |
| Positive reviews | 55.6% of reviews | **87.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 16 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Ditty Labs, LLC](https://appshunter.io/developer/420813089) | [QApps LLC](https://appshunter.io/developer/395652397) |

## What reviewers say

### Voltage Divider

[App page](https://appshunter.io/ios/app/voltage-divider/id372094728)

This engineering utility calculates unknown values in a voltage divider circuit. It can solve for voltages or resistor values, displaying ideal and actual resistor options. It also shows current, power, and voltage tolerance.

**Highlights:** Solves for Vin, Vout, R1, or R2, Resistor picker with actual values, Displays ideal resistor value, Calculates voltage tolerance, Shows current and power consumption

**Features:** macOS Compatibility

**In-app purchases:** none


### CALC Smart Calculator ±

[App page](https://appshunter.io/ios/app/calc-smart-calculator/id576675190)

This app offers a versatile calculator experience with basic, scientific, and advanced modes. It features real-time results, unit conversions, custom functions, and a shareable history. Optimized for various Apple devices, it's designed for ease of use by students, professionals, and scientists.

**Highlights:** Real-time results, Unit and currency conversions, Custom functions and constants, Shareable calculation history, Landscape mode with tape-roll, Gratuity calculator

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quarterly Supporter | $0.99 | per 3 months |
| Quarterly Supporter | $1.99 | per 3 months |
| Annual Contributor | $2.99 | per year |
| Annual Contributor | $5.99 | per year |

**What reviewers like**

- 💻 Excellent calculator functionality
- 🎨 Beautiful and clean interface
- 🔢 Displays full calculation history
- 🔍 Useful conversion tools
- 🤖 Seamless Apple Watch integration

**What reviewers complain about**

- 💰 Subscription model introduced
- 🔒 Restricted features behind paywall
- 📊 Calculation bugs and inaccuracies
- 🔄 Unnecessary UI changes frustrate users

**Reported bugs**

- Calculation errors in certain scenarios
- Forced tutorial popup on every launch
- Unreliable widget functionality

**Requested features**

- Ability to easily clear calculation history
- Option to customize button layout
- Support for entering hexadecimal numbers
- Integration with other apps and services


## Frequently asked questions

### Is Voltage Divider free?

Voltage Divider costs $1.99, with no in-app purchases.

### Is CALC Smart Calculator ± free?

CALC Smart Calculator ± is free to download, with in-app purchases available.

### Which has better reviews, Voltage Divider or CALC Smart Calculator ±?

CALC Smart Calculator ± is rated higher. Voltage Divider averages 2.7 out of 5 from 3 ratings, while CALC Smart Calculator ± averages 4.8 from 2.4K ratings.

### Do Voltage Divider or CALC Smart Calculator ± have ads?

Neither Voltage Divider nor CALC Smart Calculator ± shows ads.

### Which is updated more often, Voltage Divider or CALC Smart Calculator ±?

Voltage Divider ships an update every 48 months, and CALC Smart Calculator ± fortnightly. Most recently, Voltage Divider was updated on October 23, 2026 and CALC Smart Calculator ± on October 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*